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Summary Prospectus

May 1, 2024

SunAmerica Series Trust

SA T. Rowe Price VCP Balanced Portfolio

(Class 1 and Class 3 Shares)

SunAmerica Series Trust’s Statutory Prospectus and Statement of Additional Information, each dated May 1, 2024, as amended and supplemented from time to time, and the most recent shareholder reports are incorporated into and made part of this Summary Prospectus by reference. The Portfolio is offered only to the separate accounts of certain affiliated and unaffiliated life insurance companies and to other mutual funds. This Summary Prospectus is not intended for use by other investors.

Before you invest, you may want to review SunAmerica Series Trust’s Statutory Prospectus, which contains more information about the Portfolio and its risks. You can find the Statutory Prospectus and the above-incorporated information online at https://www.corebridgefinancial.com/getprospectus. You can also get this information at no cost by calling (800) 445-7862 or by sending an e-mail request to fundprospectus@corebridgefinancial.com.

The Securities and Exchange Commission has not approved or disapproved these securities, nor has it determined that this Summary Prospectus is accurate or complete. It is a criminal offense to state otherwise.

Investment Goal

The Portfolio’s investment goal is to seek capital appreciation and income while managing portfolio volatility.

Fees and Expenses of the Portfolio

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Portfolio. The table and the example below do not reflect the separate account fees charged in the variable annuity or variable life insurance policy (“Variable Contracts”) in which the Portfolio is offered. If separate account fees were shown, the Portfolio’s annual operating expenses would be higher. Please see your Variable Contract prospectus for more details on the separate account fees.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class 1	Class 3
Management Fees	0.76%	0.76%
Service (12b-1) Fees	None	0.25%
Other Expenses	0.05%	0.05%
Acquired Fund Fees and Expenses1	0.01%	0.01%
Total Annual Portfolio Operating Expenses1	0.82%	1.07%

The Total Annual Portfolio Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights table which reflects operating expenses of the Portfolio and do not include Acquired Fund Fees and Expenses.

Expense Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other

mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example does not reflect charges imposed by the Variable Contract. If the Variable Contract fees were reflected, the expenses would be higher. See the Variable Contract prospectus for information on such charges. Although your actual costs may be higher or lower, based on these assumptions and the net expenses shown in the fee table, your costs would be:

	1 Year	3 Years	5 Years	10 Years
Class 1	$84	$262	$455	$1,014
Class 3	109	340	590	1,306

Portfolio Turnover

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio’s performance.

During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 33% of the average value of its portfolio.

Principal Investment Strategies of the Portfolio

The Portfolio normally invests approximately 65% of its total assets in common stocks and 35% of its total assets in fixed income securities. The Portfolio invests in securities of both U.S. and foreign corporate and governmental issuers, including emerging market issuers.

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The Portfolio (not including its overlay component) will invest at least 25% of its total assets in fixed income senior securities and at least 25% of its total assets in equity securities. In addition, the subadviser employs a “VCP” (Volatility Control Portfolio) risk management process intended to manage the volatility level of the Portfolio’s annual returns. The Portfolio may, at times, invest significantly in certain sectors, such as the information technology sector.

When deciding upon overall allocations between stocks and fixed income securities, the subadviser may favor fixed income securities if the economy is expected to slow sufficiently to hurt corporate profit growth. When strong economic growth is expected, the subadviser may favor stocks. The fixed income securities in which the Portfolio intends to invest, including the foreign fixed income securities, are primarily investment grade and are chosen from across the entire government, corporate, and asset- and mortgage-backed securities markets. Maturities generally reflect the subadviser’s outlook for interest rates.

When selecting particular stocks, the subadviser will examine relative values and prospects among growth- and value-oriented stocks, domestic and foreign stocks, small- to large-cap stocks, and stocks of companies involved in activities related to commodities and other real assets. Domestic stocks are drawn from the overall U.S. market and foreign stocks are selected primarily from large companies in developed countries, although stocks in emerging markets may also be purchased. This process draws heavily upon the proprietary stock research expertise of the subadviser. While the Portfolio maintains a well-diversified portfolio, the subadviser may at a particular time shift stock selection toward markets or market sectors that appear to offer attractive value and appreciation potential.

A similar security selection process applies to fixed income securities. When deciding whether to adjust duration, credit risk exposure, or allocations among the various sectors (for example, junk bonds, mortgage- and asset-backed securities, foreign fixed income securities and emerging market fixed income securities), the subadviser weighs such factors as the outlook for inflation and the economy, corporate earnings, expected interest rate movements and currency valuations, and the yield advantage that lower-rated fixed income securities may offer over investment grade fixed income securities.

Securities may be sold for a variety of reasons, such as to effect a change in asset allocation, secure a gain, limit a loss, or redeploy assets into more promising opportunities.

The Portfolio targets a volatility level of 10% within a range of 9% to 13%. Volatility is a statistical measure of the magnitude of changes in the Portfolio’s returns over time without regard to the direction of those changes. The subadviser expects to use a variety of equity index and fixed income futures and currency forwards as the principal tools to implement this volatility management strategy. The Portfolio’s overall equity exposure may be reduced to approximately 20% as a result of the volatility management strategy. In addition, the subadviser will seek to reduce exposure to certain downside risks by purchasing equity index put options that aim to reduce the Portfolio’s exposure to certain severe and unanticipated market events that could significantly detract from returns.

Volatility is not a measure of investment performance. Volatility may result from rapid and dramatic price swings. Higher volatility generally indicates higher risk and is often reflected by frequent and sometimes significant movements up and down in value. The Portfolio could experience high levels of volatility in both rising and falling markets. Due to market conditions or other factors, the actual or realized volatility of the Portfolio for any particular period of time may be materially higher or lower than the target level.

The Portfolio’s target volatility level of 10% is not a total return performance target. The Portfolio does not expect its total return performance to be within any specified target range. It is possible for the Portfolio to maintain its volatility at or under its target volatility level while having negative performance returns. Efforts to manage the Portfolio’s volatility could limit the Portfolio’s gains in rising markets, may expose the Portfolio to costs to which it would otherwise not have been exposed, and if unsuccessful may result in substantial losses.

Principal Risks of Investing in the Portfolio

As with any mutual fund, there can be no assurance that the Portfolio’s investment goal will be met or that the net return on an investment in the Portfolio will exceed what could have been obtained through other investment or savings vehicles. Shares of the Portfolio are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation. If the value of the assets of the Portfolio goes down, you could lose money.

The value of your investment in the Portfolio may be affected by one or more of the following risks, which are described in more detail in the sections “Additional Information About the Portfolios’ Investment Strategies and Investment Risks (Other than the SA VCP Dynamic

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Allocation Portfolio and SA VCP Dynamic Strategy Portfolio)” and the “Glossary” under “Risk Terminology” in the Prospectus, any of which could cause the Portfolio’s return, the price of the Portfolio’s shares or the Portfolio’s yield to fluctuate. These risks include those associated with direct investments in securities and in the securities underlying the derivatives in which the Portfolio may invest.

Active Trading Risk. The Portfolio may engage in frequent trading of securities to achieve its investment goal. Active trading may result in high portfolio turnover and correspondingly greater brokerage commissions and other transaction costs, which will be borne directly by the Portfolio and could affect its performance. During periods of increased market volatility, active trading may be more pronounced.

Call Risk. The risk that an issuer will exercise its right to pay principal on a debt obligation (such as a mortgage-backed security or convertible security) that is held by the Portfolio earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Portfolio may be unable to recoup all of its initial investment and will also suffer from having to reinvest in lower-yielding securities.

Credit Risk. The risk that an issuer will default on interest or principal payments. The Portfolio could lose money if the issuer of a debt security is unable or perceived to be unable to pay interest or to repay principal when it becomes due. Various factors could affect the issuer’s actual or perceived willingness or ability to make timely interest or principal payments, including changes in the issuer’s financial condition or in general economic conditions. Debt securities backed by an issuer’s taxing authority may be subject to legal limits on the issuer’s power to increase taxes or otherwise raise revenue, or may be dependent on legislative appropriation or government aid. Certain debt securities are backed only by revenues derived from a particular project or source, rather than by an issuer’s taxing authority, and thus may have a greater risk of default. Credit risk applies to most debt securities, but is generally not a factor for obligations backed by the “full faith and credit” of the U.S. Government.

An issuer with a lower credit rating will be more likely than a higher rated issuer to default or otherwise become unable to honor its financial obligations. Issuers with low credit ratings typically issue junk bonds. In addition to the risk of default, junk bonds may be more volatile, less liquid, more difficult to value and more susceptible to adverse economic conditions or investor perceptions than other bonds.

Foreign Currency Risk. The value of the Portfolio’s foreign investments may fluctuate due to changes in currency exchange rates. A decline in the value of foreign currencies relative to the U.S. dollar generally can be expected to depress the value of the Portfolio’s non-U.S. dollar-denominated securities.

Emerging Markets Risk. Risks associated with investments in emerging markets may include: delays in settling portfolio securities transactions; currency and capital controls; greater sensitivity to interest rate changes; pervasive corruption and crime; exchange rate volatility; inflation, deflation or currency devaluation; violent military or political conflicts; confiscations and other government restrictions by the United States or other governments; and government instability. As a result, investments in emerging market securities tend to be more volatile than investments in developed countries.

Equity Securities Risk. This is the risk that stock prices will fall over short or extended periods of time. The Portfolio is indirectly exposed to this risk through its investments in futures contracts and other derivatives. Although the stock market has historically outperformed other asset classes over the long term, the stock market tends to move in cycles. Individual stock prices fluctuate from day-to-day and may underperform other asset classes over an extended period of time. These price movements may result from factors affecting individual companies, industries or the securities market as a whole.

Extension Risk. The risk that an issuer will exercise its right to pay principal on an obligation held by the Portfolio (such as a mortgage-backed security) later than expected. This may happen when there is a rise in interest rates. Under these circumstances the value of the obligation will decrease, and the Portfolio will also suffer from the inability to invest in higher yielding securities.

Foreign Investment Risk. The Portfolio’s investments in the securities of foreign issuers or issuers with significant exposure to foreign markets involve additional risk. Foreign countries in which the Portfolio invests may have markets that are less liquid, less regulated and more volatile than U.S. markets. The value of the Portfolio’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable government actions, and political or financial instability and other conditions or events (including, for example, military confrontations, war, terrorism, sanctions, disease/virus, outbreaks and epidemics). Lack of relevant data and reliable public information may also affect the value of these securities. The risks of foreign investments are heightened when investing in issuers in emerging market countries.

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Interest Rate Risk. Fixed income securities may be subject to volatility due to changes in interest rates. Duration is a measure of interest rate risk that indicates how price-sensitive a bond is to changes in interest rates. Longer-term and lower coupon bonds tend to be more sensitive to changes in interest rates. Any future changes in monetary policy made by central banks and/or their governments are likely to affect the level of interest rates.

Issuer Risk. The value of a security may decline for a number of reasons directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods and services.

Large-Cap Companies Risk. Large-cap companies tend to be less volatile than companies with smaller market capitalizations. In exchange for this potentially lower risk, the Portfolio’s value may not rise as much as the value of portfolios that emphasize smaller companies. Larger, more established companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. Larger companies also may not be able to attain the high growth rate of successful smaller companies, particularly during extended periods of economic expansion.

Market Risk. The Portfolio’s share price or the market as a whole can decline for many reasons or be adversely affected by a number of factors, including, without limitation: weakness in the broad market, a particular industry, or specific holdings; adverse political, regulatory or economic developments in the United States or abroad; changes in investor psychology; heavy institutional selling; military confrontations, war, terrorism and other armed conflicts, disease/virus outbreaks and epidemics; recessions; taxation and international tax treaties; currency, interest rate and price fluctuations; and other conditions or events. In addition, the subadviser’s assessment of securities held in the Portfolio may prove incorrect, resulting in losses or poor performance even in a rising market.

Mortgage- and Asset-Backed Securities Risk. Mortgage- and asset-backed securities represent interests in “pools” of mortgages or other assets, including consumer loans or receivables held in trust. Asset-backed securities issued by trusts and special purpose corporations are backed by a pool of assets, such as credit card or automobile loan receivables representing the obligations of a number of different parties. Mortgage-backed securities directly or indirectly provide funds for mortgage loans made to residential home buyers. These include securities that represent interests in pools of mortgage loans made by lenders such as commercial

banks, savings and loan institutions, mortgage bankers and others. They include mortgage pass-through securities, collateralized mortgage obligations (“CMOs”), commercial mortgage-backed securities, mortgage dollar rolls, CMO residuals, stripped mortgage-backed securities, non-agency residential mortgage-backed securities and other securities that directly or indirectly represent a participation in, or are secured by and payable from, mortgage loans or real property. The characteristics of these mortgage-backed and asset-backed securities differ from traditional fixed-income securities. Mortgage-backed securities are subject to “prepayment risk” and “extension risk.” Prepayment risk is the risk that, when interest rates fall, certain types of obligations will be paid off by the obligor more quickly than originally anticipated and the Portfolio may have to invest the proceeds in securities with lower yields. Extension risk is the risk that, when interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. Small movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain mortgage-backed securities. These securities also are subject to risk of default on the underlying mortgage, particularly during periods of economic downturn.

Prepayment Risk. As a general rule, prepayments increase during a period of falling interest rates and decrease during a period of rising interest rates. This can reduce the returns of the Portfolio because the Portfolio will have to reinvest that money at the lower prevailing interest rates. In periods of increasing interest rates, the occurrence of prepayments generally declines, with the effect that the securities subject to prepayment risk held by the Portfolio may exhibit price characteristics of longer-term debt securities.

Risk of Conflict with Insurance Company Interests. Managing the Portfolio’s volatility may reduce the risks assumed by the insurance company that sponsors your Variable Contract. This facilitates the insurance company’s ability to provide guaranteed benefits. These guarantees are optional and may not be associated with your Variable Contract. While the interests of the Portfolio’s shareholders and the affiliated insurance companies providing these guaranteed benefits are generally aligned, the affiliated insurance companies (and the adviser by virtue of its affiliation with the insurance companies) may face potential conflicts of interest. In particular, certain aspects of the Portfolio’s management have the effect of mitigating the financial risks to which the affiliated insurance companies are subjected by providing those guaranteed benefits. In addition, the Portfolio’s

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performance may be lower than similar portfolios that do not seek to manage their volatility.

Bonds Risk. The value of your investment in the Portfolio may go up or down in response to changes in interest rates or defaults (or even the potential for future defaults) by bond issuers. Fixed income securities may be subject to volatility due to changes in interest rates.

Sector or Industry Focus Risk. To the extent the Portfolio invests a significant portion of its assets in one or more sectors or industries at a time, the Portfolio will face a greater risk of loss due to factors affecting sectors or industries than if the Portfolio always maintained wide diversity among the sectors and industries in which it invests.

Securities Selection Risk. A strategy used by the Portfolio, or individual securities selected by the subadviser, may fail to produce the intended return.

Mid-Cap Companies Risk. Securities of mid-cap companies are usually more volatile and entail greater risks than securities of large companies. In addition, mid-cap companies may be traded in over-the-counter (“OTC”) markets as opposed to being traded on an exchange. OTC securities may trade less frequently and in smaller volume than exchange-listed stocks, which may cause these securities to be more volatile than exchange-listed stocks and may make it more difficult to buy and sell these securities at prevailing market prices.

Volatility Management Risk. The risk that the subadviser’s strategy for managing portfolio volatility may not produce the desired result or that the subadviser is unable to trade certain derivatives effectively or in a timely manner. In addition, the minimum and maximum equity exposure limits may prevent the subadviser from fully managing portfolio volatility in certain market environments. There can be no guarantee that the Portfolio will maintain its target volatility level. Additionally, the volatility control process will not ensure that the Portfolio will deliver competitive returns. The use of derivatives in connection with the Portfolio’s managed volatility strategy may expose the Portfolio to losses (some of which may be sudden) that it would not have otherwise been exposed to if it had only invested directly in equity and/or fixed income securities. Efforts to manage the Portfolio’s volatility could limit the Portfolio’s gains in rising markets and may expose the Portfolio to costs to which it would otherwise not have been exposed. The Portfolio’s managed volatility strategy may result in the

Portfolio outperforming the general securities market during periods of flat or negative market performance, and underperforming the general securities market during periods of positive market performance. The Portfolio’s managed volatility strategy also exposes shareholders to the risks of investing in derivative contracts. The subadviser uses a proprietary system to help it estimate the Portfolio’s expected volatility. The proprietary system used by the subadviser may perform differently than expected and may negatively affect performance and the ability of the Portfolio to maintain its volatility at or below its target volatility level for various reasons, including errors in using or building the system, technical issues implementing the system, data issues and various non-quantitative factors (e.g., market or trading system dysfunctions, and investor fear or over-reaction).

Performance Information

The following bar chart illustrates the risks of investing in the Portfolio by showing changes in the Portfolio’s performance from calendar year to calendar year and the table compares the Portfolio’s average annual returns to those of the S&P 500® Index (a broad-based securities market index) and a blended index. The blended index consists of 45.5% S&P 500® Index, 19.5% MSCI EAFE® Index (net) and 35% Bloomberg U.S. Aggregate Bond Index (the “Blended Index”). The Blended Index is relevant to the Portfolio because it has characteristics similar to the Portfolio’s investment strategies. Fees and expenses incurred at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. Of course, past performance is not necessarily an indication of how the Portfolio will perform in the future.

(Class 3 Shares)

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During the period shown in the bar chart:

Highest Quarterly Return:	June 30, 2020	11.58%
Lowest Quarterly Return:	March 31, 2020	-14.18%
Year to Date Most Recent Quarter:	March 31, 2024	7.11%

Average Annual Total Returns (For the periods ended December 31, 2023)

	1 Year	5 Years	Since Inception	Inception Date
Class 1 Shares	16.61%	7.33%	6.59%	9/26/2016
Class 3 Shares	16.29%	7.09%	6.65%	1/25/2016
S&P 500® Index (reflects no deduction for fees, expenses or taxes)	26.29%	15.69%	14.33%
Blended Index	17.24%	9.29%	8.58%

Index since inception returns reflect the inception date of Class 3 Shares.

Investment Adviser

The Portfolio’s investment adviser is SunAmerica Asset Management, LLC.

The Portfolio is subadvised by T. Rowe Price Associates, Inc. and sub-subadvised by T. Rowe Price Investment Management, Inc. and T. Rowe Price Australia Limited.

Portfolio Managers

Name and Title	Portfolio Manager of the Portfolio Since
Charles M. Shriver, CFA Vice President	2016
Sean McWilliams Vice President	2019
Toby M. Thompson, CFA, CAIA Vice President	2016
Christina Noonan, CFA Vice President	2024

Purchases and Sales of Portfolio Shares

Shares of the Portfolios may only be purchased or redeemed through Variable Contracts offered by the

separate accounts of participating life insurance companies and by other portfolios of the Trust and Seasons Series Trust. Shares of a Portfolio may be purchased and redeemed each day the New York Stock Exchange is open, at the Portfolio’s net asset value determined after receipt of a request in good order.

The Portfolios do not have any initial or subsequent investment minimums. However, your insurance company may impose investment or account minimums. Please consult the prospectus (or other offering document) for your Variable Contract which may contain additional information about purchases and redemptions of Portfolio shares.

Tax Information

The Portfolios will not be subject to U.S. federal income tax so long as they qualify as regulated investment companies and distribute their income and gains each year to their shareholders. However, contractholders may be subject to U.S. federal income tax (and a U.S. federal Medicare tax of 3.8% that applies to net investment income, including taxable annuity payments, if applicable) upon withdrawal from a Variable Contract. Contractholders should consult the prospectus (or other offering document) for the Variable Contract for additional information regarding taxation.

Payments to Broker-Dealers and
Other Financial Intermediaries

The Portfolios are not sold directly to the general public but instead are offered as an underlying investment option for Variable Contracts and to other portfolios of the Trust and Seasons Series Trust. A Portfolio and its related companies may make payments to the sponsoring insurance company (or its affiliates) for distribution and/or other services. These payments may create a conflict of interest as they may be a factor that the insurance company considers in including a Portfolio as an underlying investment option in the Variable Contract. The prospectus (or other offering document) for your Variable Contract may contain additional information about these payments.

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